Each year, bar-tailed godwits undertake the longest migration of any bird, flying from Australia and New Zealand to their breeding grounds in the Arctic and back again. They follow invisible pathways pathways that have been followed for thousands of years while braving hunger and treacherous conditions to reach their destination. In Circle,Jeannie Baker follows the godwit s incredible flight, taking us over awe-inspiring scenes as the birds spread their wings above such beautiful landmarks as the Great Barrier Reef and China s breathtaking cityscapes.